What do you ship, and which lanes are hardest to keep cold?

Hi everyone, I'm the maker of ColdLane, a shipping risk desk for people who sell perishable goods (food, flowers, cosmetics). It shows the safest ship day, how much ice to pack, and warns you if a delay puts the parcel at risk. Before launch tomorrow I'd love to hear: what do you ship, which routes or seasons cause you the most refunds, and what would you want a tool like this to tell you? You can try it free, no signup, at https://coldlane-six.vercel.app/try. Honest feedback welcome.